I looked into this a while ago and decided not to go the seahorse route. I was looking for captive bred ones to minimize disease and eating challenges, but I could not find any real good information on breeders in Canada. There are a few good ones in the US, but if I recall correctly, shipping across the border would be expensive (I might be wrong).
Alot of times the SH in the stores will claim CB, but they are really captive raised, meaning they've come out of the ocean and live in net pens. I had asked the local lfs where theirs came from, was just told they were captive bred and could not get more info. For these reasons I stayed away. If you can find someone in Canada that is breeding, that's where I go, you'll likely have more success keeping them alive long term.
Not telling you not to try, just saying they require some research before jumping in as they have specialized needs.
Good luck!!
